Signature Kidou of the Siren; Yoru no Futago

Name: Yoru no Futago (Japanese for "Twins of the Night")
Number: Currently un-numbered, but power of a 30 - 40 spell.
Category: Bakudou.
Incantation: "Washing over the weaving of eternity, stars falling. Blinding, confusing, yellow, circling across the nightsky. Double, be to!"
Effect: This kidou was created by Siren after Reikou Yuuri occupied the position as captain commander. The user folds their together and form a crucifix-like energy in the air, which will turn into a small, barrier-like wall in front of the user. The crucifix turns into a barrier after 1 post.. The barrier may seem harmless at first, but if the creator of the barrier uses Hadou and certain Bakudou (The ones capturing a victim) through the barrier, not just one kidou will appear, but two. The barrier will last for 4 posts, before it shatters. This kidou can be used again after 5 posts.

Quote :

This kidou was created by Siren after Reikou Yuuri occupied the position as captain commander. The user folds their together and form a crucifix-like energy in the air, which will turn into a small, barrier-like wall will form in front of the user. The barrier may seem harmless at first, but if the creator of the barrier uses Hadou and certain Bakudou (The ones capturing a victim) through the barrier, not just one kidou will appear, but two. The barrier will last for 4 posts, before it shatters. This kidou can be used again after 5 posts.

Does this take any time to prepare, or can she do it instantly?

Edited. ^^

Approved ^^